Belt elevator.



G. M. WOLFF.

BELT ELEVATOR. 7

APPLICATION men JULY 31. i915.

Patented Jan. 11, 1916. 1

o o o b 0 o o o o amen Caz COLUMBIA PLANOORAPH 00-, WASHINGTON. D. c.

belt which travelsaround drums or pulleys buckets being dumped when the bucket i enonenjin; worlrnnon MIL A K EwISCQL S iN. i, Y

" 1 ram. nnnvaron- To allwimm it may concern: 1

Be it known that I, GEORGE M.- WOLEF, a citizen of the United .States,rres idin'g at Milwaukee, county of Milwaukee, and State of lVisconsim have invented new and us'eful Improvements in Belt Elevators, of

which the following is a specification.

My invention relates to improvements in belt elevators of that type in which a series of buckets are mounted upon an endless at'the top and bottom, the contents ofthe "passes over the upper drum or pulley.

I of the back wall of the bucket,'whereby the In elevators of the above mentioned type, thebuckets aresecured to the belt'by riveting or bolting the back wall of each bucket to the belt along one or two transverse lines in close proximity to each other and usually j; I

[showinga modified form of construction so far as the features embodying my invens located at or near the transverse center line belt is permitted to conform to the drums or pulleys over which it runs with minimum strain upon the bolts and the portions of the belt and bucket engaged thereby. But it Q has been found that when elevators of this type areemploy'edfor elevating crushed stone or other hard'materials having sharp or cutting edges, some ofthe fragments will become lodged between the back wall of the bucket and the belt, (above theline of bolts), and will cut, tear and wear the belt adjacent to thebolts and thus greatlyimpair its strength and durability. In an efiort to overcome this difficulty, the-line or linesofbolts have sometimes been located along the upper margins of. the back wall 1 of the bucket, but in such cases the weight of the bucket and the load contained therein im poses excessive strains when the belt passes it hasbeen foundmoredesirab'le to locate -the bolts along the center of theiback wall as above stated, notwithstanding the'cutt'ing action exerted 'by 1 fragments 'ofmaterial which become lodged betw' en. the back wall and the belt.

' leys.

The-object of'my inventionv is to provide nieansltofacilitate the discharge offragments of'material from between the backwall of the f bucket and the belt, I thereby adding to the strength and durability of {the belt and also permitting the back. wall ,"of the'bucket to conform to the surface of Specification ofLettersPatent. Patm lgam; 31 3; I Applicationfiled remains, seriamoaaaia. I 'i i i i the belt throughout its length while trav ersingthefspace between the drums or pulln the vation of a fragment of an elevator'belt drawings Figure l is a front 'ele showing a bucket embodying my invention attached thereto, 7 the front wall ofv the" b'ucketbeing partially. broken awayand one end wall of the bucket beingshown in ver- .tlcal section. Fig, 2 is a vertical, sectional view of the samedraw'njon'line m-m' of: 5

Fig. 1. Fig. 3 is a view similarto Fig. 1',

tion are concerned. Fig. .tjis a vertical sec- Like parts are erence characters throughout the several views.

The elevator belt of any ordinary type. yEach'of'thebuckets is formed with aback wall B which is secured to the tional'view of the same, drawn on line g g of Fig. '3. f i a identified by. the same refbelt A, intermediateof i'ts upper. and lower.

margins and preferably adjacent :to its illustrated. The front wall-D of the bucket has its lower margin connected withthe back wall andex tends divergently upwardly and outwardly, its side margins being connected "with theside margins of the back wall byend-wajlls E. The structure thus formed is substantially wet-a in cross section. fThe parts as thus farde'scribed mayl'be of; any ordinaryf constructionandy; f

the p articularfshape of the bucket is not essential. (But it willbe observed'that the s5 transverse vcenter line,'by one or more rows; of bolts, C two rows of such'bolts' being The' verticalj'dimensions of" this slot .F areQ nonessentialybut the'openfing preferably extends from a line 'adjacentgto the upper line-of bolts to anotherline near thejfupp'er tially the same as that'shown in'Figs. 1

margin of th back wall B leaving the end portions B of the back wall connected by a comparatively narrow band B.

In the construction shown in Figs. 1 and 2, the band B is reinforced by a flat bar or plate G which is secured'to the band B" by rivets g. A set of flat or substantially flat finger plates U have their upper ends interposed between the strips of metal G and i rivets 9. These finger plates Hare'formed l3 and secured between these strips by the of resilient material and project downwardly across the slot F or substantially across'the slot with their lower'ends in close proximity to the lower margin of the slot F, and adjacent to their lower extremities these finger plates are slightly bent or o upper margins of its back wall, and added.

"ed surface for bearing contact with curved, as indicated at It, to provide a roundthe belt A.

Any fragments of material which might otherwise become lodged between the belt A and the back wall B of the bucket above the bolts C, C, will, under light pressure cause the fingers Hto springinwardly, as indicated by dotted lines in F 1g. 2, thereby relieving pressure upon the belt and preventing such fragments from cutting the belt. If notprevented by material within the bucket, these fragments will of coursebe discharged from the space between the back wall of the bucket and the belt and drop into the bucket. I am thus enabled to secure all the advantages which might be obtained by connecting the bucket to the belt along the thereto I secure the advantages of having the bucket connected to the belt along the transverse center of its back wall. In other words, my improved bucket not only provides for the discharge of material which would otherwise lodge between the back wall and the belt, but it also provides a. bucket which may pass with the belt around a pulley or drum with the load substantially balanced on the opposite sides of the line of bolts.

. Referring now to Figs. 3 and a, it will be observed that the construction is substanand 2, except in the following particulars.

that the; slot F may bev formed by suitably Eslitting thebackwall B and folding the material upwardly and downwardly to form thereinforcing strips'G and K. The bolts 0 in this construction, not only pass through the back wall and belt, but they also pass through the reinforcing strip K which is integral with the back wall, sinceit comprises a portion of that wall which has been foldeddownwardly in forming the not F.'

I ln-describing my invention with particularity, I do not wish to be understood as limiting the scope thereof to the specific form or forms of construction illustrated, the terms and expressions used being emwith a series of perforations near its transverse centerline to facilitate connecting said bucket with a belt carrier, the back wall of said bucket above said line of perforations having a slot through which material may pass from the space in the rear of the upper portion of the back wall.

2. A bucketfor belt elevators provided with a series of perforations near its transverse center line to facilitate connecting said bucket witha belt carrier, the back wall of said bucket above said line of perforations having a slot through which material may pass from the space in the rear of the upper portion of the back Wall, and a flexible screen extending substantially across said slot.

3. bucket for belt elevators provided with a series of perforations near lts trans verse center line to facilitate connecting said bucket with a belt carrier, the back wall of said bucket above said line of perforations havlng a slot through which materlal may pass from the space inthe rear of the upper portion of the back wall, and a flexible screen extending. substantially acrosssaid slot, said flexible screen comprising a series of resilient fingers composed of flat strips secured at their upper ends tothe backwall of the bucket and pro ecting downwardly into the slot, substantially as described.

4. The combination with an elevator belt,

of a bucket having the middle portion ofits back wall secured to the belt and also, having the upper portion of said wall apertured to allow material to pass through it from the space between such wall and the belt;

5. The combination with an elevatorrbelt, of a bucket having the middle portion of its back wall secured to the belt and also having the upper portion of said wall apertured to allow material to passthrough it from the space between such wall and-the belt, andmeans'for protecting the-belt in the rear of said aperture from material contained in the bucket, said protecting means being-- adapted to permit material to enter the bucket from thespace between the apertured wall and the belt.

6. A bucket for belt elevators provided with means to facilitate connecting its back Wall with a belt along a line intermediate of its upper and lower margins, and also having said back Wall apertured above said line and in proximity thereto to permit material to pass into the bucket, from the space back of said Wall.

In testimony whereof I afiix my signature in the presence of tWo Witnesses.

Witnesses:

LEVERETT C. WHEELER, IRMA D. BREMER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C.

GEORGE M. WOLFF. 

